Mobile tool chest



FIG. 1 is a front elevation view of a mobile tool chest showing my new design;

FIG. 2 is a rear elevation view of the same;

FIG. 3 is a top view of the same;

FIG. 4 is a right side view of the same; and

FIG. 5 is a left side view of the same. 

The ornamental design for a mobile tool chest, as shown and described. 